Direct-acting steam-pump.



No. 789,857. PATENTED MAY 16, 1905.

' G. HONBGGER.

DIRECT ACTING STEAM PUMP.

APPLIOATION FILED MAY 12, 1904.

3 SHEETS-SHEET 1.

No. 789.857. PATBNTED MAY 16, 1905.

- G. HONEGGER.

, DIRECT ACTING STEAM PUMP.

APPLICATION FILED MAY 12. 1904.

3 SHEETS-SHEET '2.

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No. 789,857. PATENTED MAY 16, 1905.

GfHONEGGER. DIRECT ACTING STEAM PUMP.

APPLICATION FILED MAY 12, 1904.

I 3SHEETS-SHEET 3,

Patented. May 16, 1905.

PATENT OFFICE.

GUSTAV HONEGGER, OF BERLIN, GERMANY.

DIRECT-ACTING STEAM-PUMP.

SPECIFICATION forming part of Letters Patent N 0. 789,857, dated May 16,1905. Application filed May 12,1904. Serial No. 207.672.

To all whom, it may concern:

Be it known that I, GUSTAV HONEGGER, engineer, a citizen of Switzerland,residing at 56 Gerichtstrasse, Berlin, Germany, have invented certainnew and useful Improvements in Direct-Acting Steam-Pumps, of which thefollowing is a specification.

The present invention relates to a new or improved direct-actingsteam-pump working with expansion which differs from the steampumpshitherto known by the fact that the pumping-piston itself serves toproduce the necessary equalization of pressure, so that the use ofspecial apparatus for this purpose is unnecessary and the constructionof the pump is simplified and its cost reduced. The space occupied bythe engine is also reduced and the efficiency of the latter isincreased.

The invention is illustrated in the annexed drawings, in which- Figure 1is an elevation of one form of the pump, partly in section. Figs. 2 to 7show the piston in different positions. Fig. 8 represents another formof the pumping apparatus in longitudinal section. Fig. 9is a curvediagram.

In Fig. 1, C is the engine; D, the pumping apparatus. Since theinvention relates chiefly to the latter, the construction of the engineneed not be described in detail in this specification. The constructionof the pump is as follows:'The outer circumference of thetubular-plunger piston 2, fixed to the piston-rod 1, is in contact withthe cylinder 3, and the inner circumference thereof is in contact withthe tubular trunks and 6, fixed to the casing 1. The plunger-piston isdivided into two compartments by the wall 7. These two compartments arealternately placed in communication with the duct 10 and air-drum 12 bythe ports 8 and 9, respectively, and with the suction-pipe 18 and anopen water-tank or the like by the ports 13 and lt and ducts 15 and 16.The pump sucks in liquid through the valves 17 and forces the saidliquid through the valves 11- into the drum 12, whence it passes to thepressure or delivery conduit.

The action of the apparatus is as follows: When the plunger-piston 2reaches one of its end positions, as shown in Fig. 1, it closes thechannels 10 and 15, so that, on the one hand, the plunger ceases to actas a balance device or equalizer, and, on the other hand, the stroke islimited by the liquid inclosed in the left hand compartment by thepassage of the plunger-piston over the fixed trunk 6. After the reversalof the piston the right-hand compartment thereof is placed incommunication with the air-drum, and thus opposes the movement of thepiston-rod, and the lower or left-hand compartment of the plunger-pistonis placed in communication with the suction-pipe 18. During the furthermovement of the plungerpiston toward the right, Fig. 2, the liquidcontained in the right-hand compartment is forced through the ports 9and 10 into the drum 12, overcoming the pressure in the latter, and theleft-hand compartment of the plunger-piston still remains incommunication with the suction pipe 18. When the plungerpiston reachesthe position shown in Fig. 3, it closes the channel 10, so that thecounterbalancing effect ceases and the right-hand chamber of the piston,which has previously acted as a resistance to the movement of thepiston, is

placed in communication with the suctionpipe by the port 14 and channels15 and 16. When the plunger-piston has reached the central position,(shown in Fig. 4,) both compartments thereof are cut off from theair-drum, but are still in communication with the suction-pipe. Thiscondition continues till the piston reaches the position shown in Fig.5, when the right-hand compartment is still in communication with thesuction-pipe 18; but the left-hand compartment is cut off from thelatter. The left-hand compartment then communicates with the air-drum.Whereas, however, during the first half of the stroke the compressed airopposes the movement of the piston-rod, it assists the said movementduring the second half of the stroke-that is to say, when the piston hasmoved beyond the position shown in Fig. 5, as may be seen in Fig. 7.When the plunger-piston reaches the end position on the right, thechannels 10 and 16 are again cut off from both compartments of theplunger, and the action is thereupon repeated in the opposite direction.

In the form of construction shown in Fig.

air.

' 8 the channel 10 communicates with a vertical pipe 19, so that thecompressed air inclosed in the pressure air-drum is used for balancingthe pressure and not the column of liquid under pressure. The effect isthe same, the only difference being that it is not liquid which entersthe compartments of the piston from the air-drum but compressed air. Forthe purpose of maintaining in the air-drum the necessary quantity ofair-that is to say, of replacing the air which is lost by leakage or bybeing carried away with thewater air is pumped into the drum atintervals, and a float 20, the upward-and-downward movement of which islimited oy stops 21 and 22, is provided to prevent the air in the drumfrom being carried away with the water. The said float must be providedwith holes 23 like a sieve in order to allow of the passage of the Inthis manner the 'water in the airdrum is separated from the air-chamberat all levelsand the agitation of the water during the pumping isprevented.

In the diagram shown in Fig. 9 the surface a Z) c d represents theexpansion, the surface d e f and f g 0 the resistance, and the surfaceIt i 0 (Z the pressure.

The piston can easily be removed from the cylinder, since for thispurpose it is only necessary to remove the cylinder-cover.

-What I claim as my invention, and desire to secure by Letters Patent ofthe United States, 1S

1. In a direct-acting steam-pump of the class described, the combinationof a pumpcylinder, a pair of trunks extending into the cylinder and atubular piston having its outer circumference in contact with thepump-cylinder and having its inner circumference in contact with saidtrunks, said piston being provided with a central partition dividing thepiston into two pressure-equalizing chambers.

2. In a direct-acting steam-pump of the class described, the combinationwith the cylinder, of a compression-drum communicating with thecylinder,a suction-pipe communicating with the cylinder,a tubular pistonprovided with a central partition dividing the piston into two chambers,and channels in the piston providing alternate communication of thepiston-chambers with said compression-drum and said suction-pipe tocause fluid to be sucked into the chambers and to cause the fluid in thedrum to actalternately as a resistance and a driving force to thestrokeof the piston.

3. In a direct-acting steam-pump of the class described, the combinationwith the cylinder, of a compression-drum communicating with thecylinder, asuction-pipe communicating with the cylinder, a tubularpiston provided with a central partition dividing the piston into twochambers, channels in the piston providingalternate communication of thepiston-chambers with said drumand said suction-pipe, and a pipecommunicating with one of said channels and with the drum.

The foregoing specification signed at Berlin 1 this 23d day of April,1904:.

GUSTAV HON EGGER.

In presence of- WOLDEMAR HAUPT, HENRY HASPER.

